Insulating wall



c. 'F. MAYER INSULATING WALL Feb.- 2; 1932.

Filed Feb. 25, 1929 I NVEN TOR.

ATTOPNEY6v ?atented set. a wee unease sir] tease CARL F. MAYER, 01? LAKEWOOD, OHIO insuria rme WALL Application filed February 25, 1929. Serial No. 342,525.

In Patent Number 1,468,573, I have set forth an insulating wall construction having sections adapted to be built up as desired, and to further lessen heat conduction 5 through the wall, it is advised thatasbestos packing strips be placed between interlocking metallic edges. In some complicated situations, it is difiicult or impossible to properly apply flexible packing strips, and simplification of assemblage is advantageous; My present invention relates to construction which minimizes assembling difficulties under all conditions and facilitates satisfactory installation even with unskilled labor. It

makes possible moreovera structure of low conductivity, and without undue cost. Other objects and advantages will appear as the description proceeds.

To the accomplishment ofthe foregoing I 9 and related ends, the invention, then, consists of the features hereinafter fully described,

and particularly pointed out in the claims,

the following description and the annexed drawings setting forth in detail certain struclustrative however of but one of the various ways in which the principle of theinvention resiliency is also of advantage 1n the slotway may be employed.

In said annexed drawings, Fig. 1 is a perspective view of a unit or panel in accordance with my. invention; and Fig. 2 is a section across a joint between assembled panels.

In the embodiment illustrated, metal plates 2, 3, in spaced relation have an insulative filler 4 interposed, the latter being of asbestos, or magnesia or preferred composition. Along or adjacent the edges, bridging means of low thermal conductivity is positioned, such means being of metal in order to carry such structural loads as 'are incidental to a wall construction of this character, and preferably the bridging-means is made up of skeletonized metal strips 5, these having their cross sectional continuity interrupted or modified by cut-outs or openings, for instance elongated openings 6 somewhat closely set, and in staggered relation. Placing the emphasis on the metal whichjs left rather than on the openings, the strips 5 may be regarded as comprising longitudinal portions ture embodying the invention, and beingyiltween joining strips,

such as 10 and transverse portions such as 11. It will thus be seen-that each of the short transverse connections 11 extends only be tween two adjacent longitudinalslO so that there is no direct heat path across the strip 5 as would be the case in a construction having continuous elements bridging the edge between the walls 7-7. For convenience, such groups of plates and bridging elements can be made up as units or panels, and by employing bridging pieces in the form of channels, suitable attachment may be readily had by light welding, riveting or the like at intervals, and in this manner a convenient rmetallic sheathed insulating section is avail;

able as a standardized unit capable of assem-- blage in wall structures of various dimension.

In assembling, the panels or unit sections are set up with their edges 7 in opposed relation, and joining strips 8 having slotways 9 in their marginalportions are engaged over the opposed flanges, thereby locking section to section. Preferably, such joining strips are of sheet metal of suitable gauge, and formed by bending and rebending the marginal portions, to provide oppositely directed slotways, as indicated. A certain amountof portions, as furthering the frictional .grip

supplied in the spaces beand the structure thus finally presents a continuous wall of substantially the same characteristics at each pomt, and as will beobvious, the thickness of wall 7 may be carried to any further'extent desired by use of additional layers of the panels or units.

7 As thus seen, a conveniently assembled structure can be had, suitable for low temperature or high temperature insulation, and by suitable choice of metallic gauge adaptable to such load requirements as may he inlative filling 4 is curred. In enamelling ovens, baking chamhers, drying ovens, core ovens, etc., the varying shape requirements are readily provided forby reason of the convenient unittype ele-- ments, and when assembled, even with usage under temperature conditions imposing a severe gradient, heat transfer through the walls may be held to highly favorable limits, the low-conductivity bridging elements providing unfavorable transfer paths irrespective of conditions incurred.

Other modes of applying the principle of the invention may be employed, change being made as regards the details disclosed, provided the means stated in any of the following claims, or the equivalent of'such, be employed.

I therefore particularly point out and dis tinctly claim as my invention 1. Construction of the character described, which comprises spaced metal plates,insulative filling therebetween, and 'metallic'connecting means having lowthermal conductivity bridging between said plates at the edges and confining said filling, said connecting means comprising more. than two transverse '20 portions longitudinally spaced and discon tinuons members transversely connecting said longitudinals. r

2. Constructionof the character described, which comprises spaced metal plates, insulative filling therebetaveen, and skeletonized metallic bridging pieces along the edges, said bridging pieces comprising transverse portions all of which are shorter than the panel edge width. 3. Construction of the character described,

which comprises spaced metal plates, insulative filling therebetween, and metallic chan nel bridgingpieces along the edges having narrow elongatedjslots parallel to the sides of the bridging-pieces and in staggered relation. p

4. Construction of the character described, which comprises spaced metal plates, insulative filling therebetween, joiningstrips having marginal'slotways to engage the edges of the plates, insulative filling between said strips, and skeletonized metallic bridging pieces between said plates, said bridging pieces comprising more than two transversely spaced longitudinal members and transverse members each connecting two only of said 'longitndinals.

5. Construction of the character described, which comprises spaced metal plates, insulative filling therebetween, joining StllPS having marginal slotways to engage the edges of the plates, insulative filling between said strips, and metallic channel bridging pieces having narrow elongated slots parallel to the sides of the bridging pieces and in' staggered relation. 192Sggned by me this 21st day ofFebruary,

CARL F. MAYER. 

